In a word, one measure is lost--not in effect, for the elements of the expected cadence are all present,--but in the counting.

This lost measure is the stifled cadence-measure, omitted by Elision.
Such cases are, as stated, very rare; so rare that the student will do wisely to leave them quite out of his calculations.
In order to elucidate the embarrassing matter still more fully, we shall take two more examples of a very misleading character, which the superficial observer would probably define as elisions, but which are almost certainly regular cases of disguised cadence merely: [Illustration: Example 27.

Fragment of Mozart.] Here again there is no doubt of the presence of a cadence at the first *; but this "cadence-measure" appears almost as certainly to be at the same time the initial measure of a new phrase.

This, however, proves not to be the case, because _there are four measures left, without this one_.

That is, counting backward from the final cadence, we locate the "first measure" after, not _with_, the cadence-measure.